Linear-Rate Reactions for the Thermal Devolatilization of Wheat Straw Based on Pseudo-Components

Thermogravimetric curves are measured in the nitrogen of wheat straw heated up to 773 K with rates between 5–20 K/min. A five-step (or component) parallel reaction scheme was developed for interpretation weight loss characteristics, which makes use lumped volatile products based on volatiles released by pseudo-macrocomponents. The volumetric show usual Arrhenius dependence temperature and a linear mass fraction products. devolatilization mechanism consists single step pseud-ocellulose (activation energies about 180 kJ/mol) two steps pseudohemicellulose, also including extractives, 101 136 pseudo-lignin 189 126 kJ/mol). For first pseudo-macrocomponents, activation were lower than those obtained through similar approach beech wood, owing much higher content alkalis acting as catalysts decomposition reactions. These occur at temperatures an enhanced overlap pseudo-components.